chr2-210612140-T-C

Variant names:

• chr2-210612140-T-C
• rs1553513861
• NM_001875.5:c.2415T>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Moderate BP6_Moderate BP7

The NM_001369256.1(CPS1):​c.2448T>C​(p.Phe816Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CPS1 NM_001369256.1 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.97
• Publications: 0 publications found

Genes affected

CPS1 (HGNC:2323): (carbamoyl-phosphate synthase 1) The mitochondrial enzyme encoded by this gene catalyzes synthesis of carbamoyl phosphate from ammonia and bicarbonate. This reaction is the first committed step of the urea cycle, which is important in the removal of excess urea from cells. The encoded protein may also represent a core mitochondrial nucleoid protein. Three transcript variants encoding different isoforms have been found for this gene. The shortest isoform may not be localized to the mitochondrion. Mutations in this gene have been associated with carbamoyl phosphate synthetase deficiency, susceptibility to persistent pulmonary hypertension, and susceptibility to venoocclusive disease after bone marrow transplantation.[provided by RefSeq, May 2010]

CPS1 Gene-Disease associations (from GenCC):

• carbamoyl phosphate synthetase I deficiency disease

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), ClinGen, Myriad Women’s Health

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.42).
• BP6: Variant 2-210612140-T-C is Benign according to our data. Variant chr2-210612140-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1590474.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.97 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001369256.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CPS1	NM_001875.5	MANE Select	c.2415T>C	p.Phe805Phe	synonymous	Exon 20 of 38	NP_001866.2
	CPS1	NM_001369256.1		c.2448T>C	p.Phe816Phe	synonymous	Exon 21 of 39	NP_001356185.1
	CPS1	NM_001122633.3		c.2415T>C	p.Phe805Phe	synonymous	Exon 21 of 39	NP_001116105.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CPS1	ENST00000233072.10	TSL:1 MANE Select	c.2415T>C	p.Phe805Phe	synonymous	Exon 20 of 38	ENSP00000233072.5
	CPS1	ENST00000430249.7	TSL:1	c.2433T>C	p.Phe811Phe	synonymous	Exon 21 of 39	ENSP00000402608.2
	CPS1	ENST00000451903.3	TSL:1	c.1062T>C	p.Phe354Phe	synonymous	Exon 10 of 28	ENSP00000406136.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Congenital hyperammonemia, type I (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.42
CADD	Benign	7.0
DANN	Benign	0.73
PhyloP100		2.0
Mutation Taster		=89/11	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1553513861; hg19: chr2-211476864;